Measuring Spin of the Remnant Black Hole from Maximum Amplitude
Measuring Spin of the Remnant Black Hole from Maximum Amplitude
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从最大振幅测量残余黑洞的自旋
DOI：
10.1103/physrevlett.123.151101
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发表时间：
2019
影响因子：
8.6
通讯作者：
Shoemaker, Deirdre
中科院分区：
文献类型：
--
作者：
Ferguson, Deborah;Ghonge, Sudarshan;Clark, James A.;Calderon Bustillo, Juan;Laguna, Pablo;Shoemaker, Deirdre
两个黑洞合并时发出的引力波携带着关于残余黑洞的信息，即它的质量和自旋。这些信息通常是在黑洞稳定到最终状态时从衰荡辐射中发现的。我们发现，残余黑洞的自旋是已知的引力波应变的峰值振幅。利用这一知识，我们提出了一种新的方法来测量的最终自旋是模板无关的，只使用啁啾质量，瞬时频率的应变，其导数在最大振幅，所有模板无关。
Gravitational waves emitted during the merger of two black holes carry information about the remnant black hole, namely its mass and spin. This information is typically found from the ringdown radiation as the black hole settles to a final state. We find that the remnant black hole spin is already known at the peak amplitude of the gravitational wave strain. Using this knowledge, we present a new method for measuring the final spin that is template independent, using only the chirp mass, the instantaneous frequency of the strain, and its derivative at maximum amplitude, all template independent.